diff --git a/iopsys-brcm63xx-arm/base-files/etc/macoffset b/iopsys-brcm63xx-arm/base-files/etc/macoffset
index a149d8d42142b6e887d07d06961f1aa817ca0ad5..6582ecd64e1ac639580f52f59b0986bbe5b46a83 100644
--- a/iopsys-brcm63xx-arm/base-files/etc/macoffset
+++ b/iopsys-brcm63xx-arm/base-files/etc/macoffset
@@ -1,8 +1,9 @@
 {
-        "size" : 16,
-        "config": [
-                "network.lan",
-                "network.wan"
-        ]
+	"size" : 16,
+	"config": [
+		"_RESERVED_",
+		"network.lan",
+		"network.wan"
+	]
 }